Conquer the mountains with the speed of a diving spine-tailed swift (Hirundapus Caudacatus). Patagonia built the ultra-lightweight Women's Tsali Trail Running Shoe to help you crush your best time in comfort and safety. That's right, safety. Patagonia's X-Dynamic lacing system, combined with an internal support system and EVA perforated footbed supports, gives you stability on uneven terrain to avoid a crash-and-burn. The DWR-treated mesh upper wicks moisture to keep your feet dry and cozy, and the DuPont foam footframe is 25% lighter than standard EVA to reduce long-term fatigue.